【正确答案】Hyponymy is a matter of class membership．The upper term in this sense relation, i.e. the class name, is called superordinate, and the lower terms, tile members, hyponyms．A superordinate usually has several hyponyms．These members of the same class are co-hyponyms．

【答案解析】[解析] 本题考查的是下义词的含义。